CN217837484U

CN217837484U - Feeding and discharging device of electric cooker production line

Info

Publication number: CN217837484U
Application number: CN202221820389.0U
Authority: CN
Inventors: 林欣欣; 刘璨; 周本政; 廖光皓; 谢炳生; 李泰星; 刘健
Original assignee: Guangdong Ocean University
Current assignee: Guangdong Ocean University
Priority date: 2022-07-14
Filing date: 2022-07-14
Publication date: 2022-11-18
Anticipated expiration: 2032-07-14

Abstract

The utility model relates to an electricity rice cooker production technical field discloses an unloader on electricity rice cooker production line, base, platform and a plurality of work unit, the platform is located the top of base, the platform with the base rotates to be connected, just the axis of rotation of platform sets up along vertical direction, the work unit includes guide rail, xarm and centre gripping manipulator, the guide rail is located the top of platform, the guide rail sets up along vertical direction, the xarm sets up along the horizontal direction, the one end of xarm is connected with removing along vertical direction on the guide rail, the centre gripping manipulator connect in the other end of xarm, both realized the unloading of spraying line, also realized the material loading of stoving line, reduced the use quantity of manipulator, reduce cost to shorten the transit time, improve production efficiency.

Description

Feeding and discharging device of electric cooker production line

Technical Field

The utility model relates to an electricity rice cooker production technical field especially relates to an unloader on electricity rice cooker production line.

Background

In the production of the electric cooker, after a layer of non-stick coating is sprayed on the inner wall of the inner container of the electric cooker on a spraying line, the sprayed inner container needs to be transferred to a drying line for drying. At present, a manipulator is generally adopted to take down the inner container of the electric cooker which is well sprayed on a spraying line, so as to realize blanking. However, the back is got from the spraying line clamp with electric rice cooker inner bag to present manipulator, through elevating system, can only put near the spraying line with electric rice cooker inner bag, then need transport near the stoving line, and the rethread manipulator carries out the material loading with electric rice cooker inner bag, leads to the quantity of manipulator big, and is with high costs to go up unloading time and transit time long, production efficiency hangs down.

The prior art discloses a feeding and discharging manipulator for a drying line of an inner container of an electric cooker, which comprises a rack, a lifting mechanism, a swinging mechanism and a grabbing mechanism, wherein the lifting mechanism is arranged on the rack; the lifting mechanism is provided with a guide rail and a first bracket, the guide rail is arranged on the rack, and the first bracket is connected with the guide rail; the swing mechanism is provided with a first swing mechanism and a second swing mechanism, the first swing mechanism is provided with a first swing arm and a first power device, the first swing arm is connected with the first support, and the first swing arm is connected with the first power device; the second swing mechanism is connected with the first swing arm, and the grabbing mechanism is connected with the second swing mechanism. The manipulator of this patent can only place near spraying line with electric rice cooker inner bag, then need transport near stoving line, and the rethread manipulator carries out the material loading with electric rice cooker inner bag, leads to the quantity of manipulator big, and is with high costs to go up unloading time and transit time long, production efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an unloader on electric rice cooker production line that production efficiency is high.

In order to realize the above aim, the utility model provides an unloader on electricity rice cooker production line, base, platform and a plurality of work unit, the platform is located the top of base, the platform with the base rotates to be connected, just the axis of rotation of platform sets up along vertical direction, the work unit includes guide rail, xarm and centre gripping manipulator, the guide rail is located the top of platform, the guide rail sets up along vertical direction, the xarm sets up along the horizontal direction, the one end of xarm is connected with removing along vertical direction on the guide rail, the centre gripping manipulator connect in the other end of xarm.

Preferably, the clamping manipulator comprises a clamping mechanism and a self-locking mechanism, the clamping mechanism comprises a supporting block, a connecting block and two clamping hands, the supporting block is connected with the cross arm, one ends of the two clamping hands are rotatably connected to the supporting block, the connecting block is located between the two clamping hands, the connecting block is connected with the clamping hands through a connecting rod, two ends of the connecting rod are respectively rotatably connected with the connecting block and the clamping hands, the self-locking mechanism is arranged between the two clamping hands, and the self-locking mechanism is used for enabling the clamping mechanism to keep a clamping state.

As a preferred scheme, the self-locking mechanism comprises an installation seat, a push rod, a sliding block, an elastic block, a first spring and a driving device, wherein the supporting block is provided with a first through hole, the installation seat is hollow, one end of the installation seat is open, the other end of the installation seat is closed, the open end of the installation seat is connected with the supporting block, the installation seat and the clamping hands are located on two sides of the supporting block, the push rod is located between the two clamping hands, one end of the push rod penetrates through the first through hole and extends into the installation seat, the sliding block is located in the installation seat and is connected with the push rod, the first spring is located in the installation seat, the first spring is located between the sliding block and the supporting block, two ends of the first spring are respectively connected with the sliding block and the supporting block, the bottom surface of the installation seat is provided with a second through hole communicated with the interior of the installation seat, the driving device is connected with the supporting block, the driving device is connected with the elastic block, and the driving device drives the elastic block to enter or move up and down through the second through hole or withdraw from the installation seat.

Preferably, the driving device includes a second spring and an electromagnet, the electromagnet is connected to the support block, the electromagnet is located below the mounting seat, the second spring is located between the spring block and the electromagnet, two ends of the second spring are respectively connected to the spring block and the electromagnet, and the spring block is a magnet or a ferromagnetic metal member.

As preferred scheme, drive arrangement still includes the mounting panel, the mounting panel with the supporting block is connected, the mounting panel is located the below of mount pad, just the mounting panel for the second through-hole is closer to the supporting block, bullet piece is rectangular shape structure, the one end of bullet piece with the mounting panel rotates to be connected, the other end of bullet piece with second spring coupling.

Preferably, the clamping manipulator further comprises a follow-up mechanism, the follow-up mechanism comprises a loop bar, a seat sleeve and a third spring, two ends of the seat sleeve are open, the seat sleeve is connected to the cross arm, one end of the loop bar is connected with the supporting block, the other end of the loop bar extends into the seat sleeve, the third spring is located in the seat sleeve, and the third spring is located between the loop bar and the cross arm.

Preferably, the working unit further includes a lifting mechanism, the lifting mechanism includes a lifting motor, a screw rod and a lifting seat, the lifting seat is connected to the guide rail in a vertically slidable manner, the cross arm is connected to the lifting seat, the lifting motor is located below the platform, an output shaft of the lifting motor penetrates through the platform, the screw rod is located above the platform and is arranged in a vertical direction, the screw rod is coaxially fixed to the output shaft of the lifting motor, the lifting seat is provided with a third through hole, the screw rod penetrates through the third through hole, and the screw rod is in threaded connection with the third through hole.

As preferred scheme, still include the rotating electrical machines, the rotating electrical machines is equipped with on the base, the below of platform is connected with the axle sleeve, the axle sleeve with the output shaft of rotating electrical machines passes through the key-type connection.

Preferably, a plurality of reinforcing ribs are connected between the platform and the shaft sleeve.

Preferably, when the plurality of working units are arranged, the plurality of working units are evenly arranged around the center of the platform at intervals in the circumferential direction.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses a connect rotatable platform on the base, the centre gripping manipulator passes through the xarm and is connected with the guide rail on the platform, the xarm has increased the distance between centre gripping manipulator and the base, make the device place between spraying line and stoving line, and the centre gripping manipulator can stretch on spraying line and the stoving line, after the centre gripping is to electric rice cooker inner bag on the spraying line to the centre gripping manipulator, the platform rotates, makes the centre gripping manipulator rotate the top of stoving line thereupon, the centre gripping manipulator loosens, can realize the material loading of stoving line, therefore, the utility model discloses a unloading of spraying line has both been realized to a device, has also realized the material loading of stoving line, reduces the use quantity of manipulator, reduce cost to shorten the transit time, improve production efficiency.

Drawings

Fig. 1 is a front view of the blanking device of the electric cooker production line of the embodiment of the utility model.

Fig. 2 is a top view of the blanking device of the electric rice cooker production line of the embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a clamping robot according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a self-locking mechanism according to an embodiment of the present invention.

In the figure, 1-base; 2-a platform; 3-a guide rail; 4-a cross arm; 5-a support block; 501-a first through hole; 6-connecting a block; 7-clamping the hand; 8-a connecting rod; 9-a mounting seat; 901-a second via; 10-a push rod; 11-a slide block; 12-a spring block; 13-a first spring; 14-a second spring; 15-an electromagnet; 16-a mounting plate; 17-a loop bar; 18-seat covers; 19-a third spring; 20-a lifting motor; 21-a screw rod; 22-a lifting seat; 23-a rotating electrical machine; 24-a shaft sleeve; 25-reinforcing rib plates.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Example one

As shown in fig. 1 to 4, the utility model discloses the last unloader of electricity rice cooker production line of preferred embodiment, base 1, platform 2 and a plurality of work unit, platform 2 is located the top of base 1, platform 2 rotates with base 1 to be connected, and platform 2's axis of rotation sets up along vertical direction, the work unit includes guide rail 3, xarm 4 and centre gripping manipulator, platform 2's top is located to guide rail 3, guide rail 3 sets up along vertical direction, xarm 4 sets up along the horizontal direction, the one end of xarm 4 is connected on guide rail 3 along vertical direction removal, the centre gripping manipulator is connected in the other end of xarm 4. This embodiment is through connecting rotatable platform 2 on base 1, the centre gripping manipulator passes through xarm 4 and is connected with guide rail 3 on the platform 2, xarm 4 has increased the distance between centre gripping manipulator and the base 1, make the device place between spraying line and stoving line, and the centre gripping manipulator can stretch on spraying line and the stoving line, after the centre gripping manipulator centre gripping reaches the electric rice cooker inner bag on the spraying line, platform 2 rotates, make the centre gripping manipulator rotate the top of stoving line thereupon, the centre gripping manipulator loosens, can realize the material loading of stoving line, therefore, this embodiment has both realized the unloading of spraying line through a device, the material loading of stoving line has also been realized, reduce the use quantity of manipulator, and the cost is reduced, and shorten the transit time, and the production efficiency is improved.

When the work unit sets up to a plurality ofly, a plurality of work units evenly set up around the central circumference interval of platform 2, can further improve production efficiency. In this embodiment, the two working units are arranged on the same straight line passing through the center of the platform 2, so that after the working units are clamped to the inner container of the electric cooker on the spraying line, the platform 2 rotates 180 degrees, and then the other working unit can clamp the inner container of the electric cooker, thereby avoiding interference between the two working units.

Example two

The present embodiment is different from the first embodiment in that the present embodiment further describes a clamping robot on the basis of the first embodiment.

In this embodiment, the clamping manipulator includes fixture and self-locking mechanism, fixture includes supporting block 5, connecting block 6 and two tong 7, supporting block 5 is connected with xarm 4, the one end of two tong 7 is rotated and is connected on supporting block 5, connecting block 6 is located between two tong 7, and be connected through connecting rod 8 between connecting block 6 and the tong 7, the both ends of connecting rod 8 rotate with connecting block 6 and tong 7 respectively and are connected, self-locking mechanism locates between two tong 7, self-locking mechanism is used for making fixture keep the clamping state. Through the rotation of the clamping hands 7, the two clamping hands 7 can be close to or far away from each other, and the inner container of the electric cooker can be clamped and released. The self-locking mechanism can keep the rotation angle of the two clamping hands 7 unchanged after the clamping mechanism clamps the inner container of the electric cooker, thereby preventing the inner container of the electric cooker from falling off when the platform 2 rotates.

The self-locking mechanism of the embodiment comprises an installation base 9, a push rod 10, a sliding block 11, an elastic block 12, a first spring 13 and a driving device, wherein the supporting block 5 is provided with a first through hole 501, the installation base 9 is hollow, one end of the installation base 9 is open, the other end of the installation base is closed, the open end of the installation base 9 is connected with the supporting block 5, the installation base 9 and the clamping hands 7 are located on two sides of the supporting block 5, the push rod 10 is located between the two clamping hands 7, one end of the push rod 10 penetrates through the first through hole 501 and extends into the installation base 9, the sliding block 11 is located in the installation base 9 and is connected with the push rod 10, the first spring 13 is located in the installation base 9, the first spring 13 is located between the sliding block 11 and the supporting block 5, two ends of the first spring 13 are respectively connected with the sliding block 11 and the supporting block 5, the bottom surface of the installation base 9 is provided with a second through hole 901 which is communicated with the interior of the installation base 9, the driving device is connected with the elastic block 12, and the driving device drives the elastic block 12 to move up and down to enter or exit from the installation base 9 through the second through hole 901. When the clamping is performed, the inner container of the electric cooker enters the process between the two clamping hands 7, the inner container of the electric cooker pushes the push rod 10 to move, the push rod 10 drives the sliding block 11 to move towards the direction far away from the supporting block 5, the first spring 13 is stretched, when the inner container of the electric cooker completely enters the space between the two clamping hands 7, the position of the sliding block 11 is far away from the supporting block 5 relative to the second through hole 901, and the elastic block 12 enters the mounting seat 9 through the second through hole 901, blocks the sliding block 11 and realizes self-locking. When the platform 2 rotates in place, and is released, the elastic block 12 exits the mounting seat 9 through the second through hole 901, the first spring 13 recovers to drive the push rod 10 to move, so that the inner container of the electric cooker is pushed out, and automatic release is realized.

Optionally, the driving device includes a second spring 14 and an electromagnet 15, the electromagnet 15 is connected to the support block 5, the electromagnet 15 is located below the mounting seat 9, the second spring 14 is located between the elastic block 12 and the electromagnet 15, two ends of the second spring 14 are respectively connected to the elastic block 12 and the electromagnet 15, and the elastic block 12 is a magnet or a ferromagnetic metal piece. The electromagnet 15 is electrified to attract the elastic block 12, so that the elastic block 12 moves downwards to compress the second spring 14; the electromagnet 15 is powered off, no attraction force is generated on the elastic block 12, and the second spring 14 is restored to drive the elastic block 12 to move upwards; thereby realizing the up-and-down movement of the elastic block 12 and further realizing the self-locking and unlocking.

In addition, the driving device of the embodiment further includes a mounting plate 16, the mounting plate 16 is connected to the support block 5, the mounting plate 16 is located below the mounting seat 9, the mounting plate 16 is closer to the support block 5 relative to the second through hole 901, the elastic block 12 is in a long strip-shaped structure, one end of the elastic block 12 is rotatably connected to the mounting plate 16, and the other end of the elastic block 12 is connected to the second spring 14. When the electromagnet 15 is powered off, the second spring 14 is in a free state, so that the elastic block 12 extends into the mounting seat 9 through the second through hole 901, at this time, the elastic block 12 is in an inclined upward state, when the electric cooker inner container pushes the push rod 10, the push rod 10 moves, and the slide block 11 is driven to move towards the direction far away from the supporting block 5, the slide block 11 is in contact with the elastic block 12 and gradually presses down the elastic block 12, the second spring 14 is compressed, when the slide block 11 moves to the rear side of the second through hole 901, the second spring 14 recovers to drive the elastic block 12 to extend into the mounting seat 9 again, so that the slide block 11 is blocked, so that self-locking is realized, when the slide block 11 is released, the electromagnet 15 is electrified, the elastic block 12 is attracted to move downwards, the slide block 11 passes through the second through hole to be close to the supporting block 5 under the driving of the first spring 13, the push rod 10 is driven to move, so as to push out the electric cooker inner container, so that release is realized, then, the electromagnet 15 is powered off, the second spring 14 recovers, and drives the elastic block 12 to move upwards, so that the initial state is recovered. The elastic block 12 is arranged to be long-strip-shaped, and the elastic block 12 is rotatably connected with the mounting plate 16, so that the electrifying times of the electromagnet 15 can be reduced, and energy conservation and high efficiency are realized.

In addition, the clamping manipulator of the embodiment further comprises a follow-up mechanism, the follow-up mechanism comprises a sleeve rod 17, a seat sleeve 18 and a third spring 19, the two ends of the seat sleeve 18 are open, the seat sleeve 18 is connected to the cross arm 4, one end of the sleeve rod 17 is connected with the supporting block 5, the other end of the sleeve rod 17 extends into the seat sleeve 18, the third spring 19 is located in the seat sleeve 18, and the third spring 19 is located between the sleeve rod 17 and the cross arm 4. The rice cooker inner container passes through the conveyor belt when being conveyed on the spraying line, the clamping mechanical arm is positioned in the conveying direction of the conveyor belt when being clamped, the rice cooker inner container enters the two clamping hands 7 of the clamping mechanical arm under the driving of the conveyor belt, the clamping mechanical arm is pushed along with the movement of the rice cooker inner container in the process that the rice cooker inner container enters the space between the two clamping hands 7, the sleeve rod 17 further extends into the seat sleeve 18, the third spring 19 is compressed, and after the rice cooker inner container is clamped, the third spring 19 is restored to drive the clamping mechanical arm to restore the initial state. The servo mechanism can prevent the rigid collision between the inner container of the electric cooker and the clamping manipulator and prevent the inner container of the electric cooker from being damaged during clamping.

Other structures of this embodiment are the same as those of the first embodiment, and are not described herein again.

EXAMPLE III

The difference between this embodiment and the second embodiment is that, on the basis of the second embodiment, the working unit is further described in this embodiment.

In this embodiment, the work unit further includes elevating system, elevating system includes elevator motor 20, lead screw 21 and lift seat 22, lift seat 22 can be connected with guide rail 3 with sliding from top to bottom, elevator motor 20 is located the below of platform 2, elevator motor 20's output shaft passes platform 2, lead screw 21 is located the top of platform 2 and follows vertical direction setting, lead screw 21 is coaxial fixed with elevator motor 20's output shaft, lift seat 22 is equipped with the third through-hole, lead screw 21 passes from the third through-hole, and lead screw 21 and third through-hole threaded connection, the outer wall of lead screw 21 is equipped with the external screw thread, the pore wall of third through-hole is equipped with the internal thread with the external screw thread matched with of lead screw 21. The lifting motor 20 drives the screw rod 21 to rotate, so that the lifting seat 22 can move up and down along the screw rod 21, and the cross arm 4 can move up and down.

In addition, unloader of this embodiment still includes rotating electrical machines 23, and on rotating electrical machines 23 was equipped with base 1, the below of platform 2 was connected with axle sleeve 24, and axle sleeve 24 passes through the key-type connection with rotating electrical machines 23's output shaft. The platform 2 can be driven to rotate by the rotating motor 23. Further, a plurality of reinforcing ribs 25 are connected between the platform 2 and the shaft sleeve 24 of the present embodiment, so that the strength of the platform 2 and the shaft sleeve 24 can be increased. The reinforcing rib plate 25 is a right-angled triangle mechanism, and two right-angled sides of the reinforcing rib plate 25 are respectively connected with the platform 2 and the shaft sleeve 24.

In addition, the clamping hand 7 of the embodiment is of a v-shaped structure, so that the contact point between the clamping hand 7 and the inner container of the electric cooker can be increased, and the clamping is more stable.

Other structures of this embodiment are the same as those of the embodiment, and are not described herein again.

The utility model discloses a working process does: during clamping, the clamping manipulator is positioned above the spraying line and in the conveying direction of the spraying line, the lifting motor 20 drives the cross arm 4 to descend, so that the clamping manipulator and the rice cooker liner on the conveying belt of the spraying line are positioned on the same horizontal position, and the clamping manipulator can contact the rice cooker liner. The inner container of the electric cooker is driven by the spraying line conveyor belt to move towards the clamping manipulator and gradually squeeze into the space between the two clamping hands 7, and as the inner container of the electric cooker is close to the clamping manipulator, the supporting block 5 is close to the cross arm 4, so that the loop bar 17 further extends into the seat sleeve 18, and the third spring 19 is compressed. When the inner container of the electric cooker enters between the two clamping hands 7, the clamping hands 7 rotate outwards, the inner container of the electric cooker pushes the push rod 10, the push rod 10 moves to drive the slide block 11 to move towards the direction far away from the supporting block 5, the first spring 13 is stretched, the slide block 11 is contacted with the elastic block 12 and gradually presses the elastic block 12 downwards, the second spring 14 is compressed, and when the slide block 11 moves to the rear of the second through hole 901, the second spring 14 is restored to drive the elastic block 12 to extend into the mounting seat 9 again to block the slide block 11, so that clamping is completed and self-locking is realized. Then, the lifting motor 20 lifts the crossbar 4, the third spring 19 returns, and the gripping robot is returned to the initial position of the crossbar 4. The rotary motor 23 drives the platform 2 to rotate, so that the clamping manipulator rotates to the upper part of the drying line, and then the lifting motor 20 drives the cross arm 4 to descend. The electromagnet 15 is electrified, the elastic block 12 is attracted and moves downwards, the first spring 13 is recovered, the sliding block 11 is driven to cross the second through hole 901 to be close to the supporting block 5, the push rod 10 is driven to move, the inner container of the electric cooker is pushed out, and release is achieved.

To sum up, the embodiment of the utility model provides an unloader of electricity rice cooker production line, it is through connecting rotatable platform 2 on base 1, the centre gripping manipulator passes through the xarm 4 and is connected with the guide rail 3 on the platform 2, xarm 4 has increased the distance between centre gripping manipulator and the base 1, make the device place between spraying line and stoving line, and the centre gripping manipulator can stretch on spraying line and the stoving line, after the centre gripping manipulator centre gripping arrives electric rice cooker inner bag on the spraying line, platform 2 rotates, make the centre gripping manipulator rotate the top of stoving line thereupon, the centre gripping manipulator loosens, can realize the material loading of stoving line, therefore, this embodiment has both realized the unloading of spraying line through a device, the material loading of stoving line has also been realized, reduce the use quantity of manipulator, and therefore, the cost is reduced, and the transit time is shortened, and the production efficiency is improved. And, the utility model discloses the centre gripping manipulator does not adopt actuating device to realize centre gripping and release, still can realize the auto-lock.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be considered as the protection scope of the present invention.

Claims

1. The utility model provides a unloader on electricity rice cooker production line which characterized in that, base (1), platform (2) and a plurality of work unit, platform (2) are located the top of base (1), platform (2) with base (1) rotates to be connected, just the axis of rotation of platform (2) sets up along vertical direction, the work unit includes guide rail (3), xarm (4) and centre gripping manipulator, guide rail (3) are located the top of platform (2), guide rail (3) set up along vertical direction, xarm (4) set up along the horizontal direction, the one end of xarm (4) is connected with removing along vertical direction on guide rail (3), the centre gripping manipulator connect in the other end of xarm (4).

2. The loading and unloading device for the electric cooker production line according to claim 1, wherein the clamping manipulator comprises a clamping mechanism and a self-locking mechanism, the clamping mechanism comprises a supporting block (5), a connecting block (6) and two clamping hands (7), the supporting block (5) is connected with the cross arm (4), one ends of the two clamping hands (7) are rotatably connected to the supporting block (5), the connecting block (6) is located between the two clamping hands (7), the connecting block (6) is connected with the clamping hands (7) through a connecting rod (8), two ends of the connecting rod (8) are respectively rotatably connected with the connecting block (6) and the clamping hands (7), the self-locking mechanism is arranged between the two clamping hands (7), and the self-locking mechanism is used for keeping the clamping mechanism in a clamping state.

3. The loading and unloading device for the electric cooker production line as claimed in claim 2, wherein the self-locking mechanism comprises a mounting seat (9), a push rod (10), a sliding block (11), an elastic block (12), a first spring (13) and a driving device, the supporting block (5) is provided with a first through hole (501), the mounting seat (9) is hollow and has an open end at one end and a closed end at the other end, the open end of the mounting seat (9) is connected with the supporting block (5), the mounting seat (9) and the clamping hands (7) are positioned at two sides of the supporting block (5), the push rod (10) is positioned between the two clamping hands (7), one end of the push rod (10) passes through the first through hole (501) and extends into the mounting seat (9), the sliding block (11) is positioned in the mounting seat (9) and is connected with the push rod (10), the first spring (13) is positioned in the mounting seat (9), the first spring (13) is positioned between the sliding block (11) and the supporting block (5), the second spring (11) is connected with the mounting seat (5), and the second through hole (901) and the second through hole (11) are respectively connected with the mounting block (5), the driving device is connected with the elastic block (12), and the driving device drives the elastic block (12) to move up and down so as to enter or exit the mounting seat (9) through the second through hole (901).

4. The loading and unloading device for the electric cooker production line as claimed in claim 3, wherein the driving device comprises a second spring (14) and an electromagnet (15), the electromagnet (15) is connected with the supporting block (5), the electromagnet (15) is located below the mounting seat (9), the second spring (14) is located between the elastic block (12) and the electromagnet (15), two ends of the second spring (14) are respectively connected with the elastic block (12) and the electromagnet (15), and the elastic block (12) is a magnet or a ferromagnetic metal piece.

5. The loading and unloading device for the electric cooker production line as claimed in claim 4, wherein the driving device further comprises a mounting plate (16), the mounting plate (16) is connected with the support block (5), the mounting plate (16) is located below the mounting seat (9), the mounting plate (16) is closer to the support block (5) relative to the second through hole (901), the spring block (12) is of a long strip-shaped structure, one end of the spring block (12) is rotatably connected with the mounting plate (16), and the other end of the spring block (12) is connected with the second spring (14).

6. The loading and unloading device for electric cooker production line as claimed in claim 2, wherein said gripping robot further comprises a follower mechanism, said follower mechanism comprises a sleeve rod (17), a sleeve (18) and a third spring (19), both ends of said sleeve (18) are open, said sleeve (18) is connected to said cross arm (4), one end of said sleeve rod (17) is connected to said supporting block (5), the other end of said sleeve rod (17) extends into said sleeve (18), said third spring (19) is located in said sleeve (18), and said third spring (19) is located between said sleeve rod (17) and said cross arm (4).

7. The loading and unloading device for the electric cooker production line as claimed in claim 1, wherein the working unit further comprises a lifting mechanism, the lifting mechanism comprises a lifting motor (20), a screw rod (21) and a lifting seat (22), the lifting seat (22) is connected with the guide rail (3) in a vertically sliding manner, the cross arm (4) is connected with the lifting seat (22), the lifting motor (20) is located below the platform (2), an output shaft of the lifting motor (20) penetrates through the platform (2), the screw rod (21) is located above the platform (2) and is arranged in a vertical direction, the screw rod (21) is coaxially fixed with the output shaft of the lifting motor (20), the lifting seat (22) is provided with a third through hole, the screw rod (21) penetrates through the third through hole, and the screw rod (21) is in threaded connection with the third through hole.

8. The loading and unloading device for the electric cooker production line as claimed in claim 1, further comprising a rotating motor (23), wherein the rotating motor (23) is arranged on the base (1), a shaft sleeve (24) is connected below the platform (2), and the shaft sleeve (24) is in key connection with an output shaft of the rotating motor (23).

9. The loading and unloading device for the electric cooker production line as claimed in claim 8, wherein a plurality of reinforcing ribs (25) are connected between the platform (2) and the shaft sleeve (24).

10. The loading and unloading device for the electric cooker production line as claimed in claim 1, wherein when the plurality of working units are provided, the plurality of working units are uniformly arranged around the center of the platform (2) at intervals in the circumferential direction.